Desk set fountain pen sleeve



July 26, 1932. s. NAKAHARA DESK SET FOUNTAIN PEN SLEEVE Filed Sept. 30, 1951 INVENTOR ATTORNEY Patented July 26, 1932 SADAYOSI-II NAKAHARA, OF NEW YORK, N. Y.

DESK SET FOUNTAIN PEN SLEEVE Application filed September 30, 1931. Serial N0. 565,965.

This improvement relates to a fountain pen sleeve for desk sets, which in the present instance is provided with readily adjustable means for varying the effective in ternal diameter (within the socket) in order that fountain pens with stems of different diameters may be inserted and properly retained firmly in position in the sleeve.

It is also desirable to be able to insert and remove the pen of the desk set without getting ink on the stem thereof and yet have it held closely and firmly in axial position in the sleeve socket. Accordingly, one object of this improvement is to provide a rotary mouth piece for the sleeve which may be readily rotated by the fingers to enlarge or reduce the diameter of the stem supporting part of the socket and to provide means to clamp the stem of the pen firmly after the latter is inserted in the socket. It is important that the pen should be held firmly for the sleeve is supported by a ball and socket joint and may be moved to any angu lar position between vertical and horizontal.

A further object is to reduce the contact surface of the socket members engaging the stem of the pen substantially to points in order to minimize the chances of getting ink on the stem when the pen is inserted or removed from the sleeve. For this reason, the clamping members forming the socket of variable diameter in the present instance are constituted as balls on the ends of resilient fingers, but obviously other suitable devices may be employed.

One form of the improved desk set fountain pen sleeve and the mounting therefor is shown in the accompanying drawing, in which Fig. 1 is a side view of the desk set with the sleeve in upright position, the sleeve and part of the mounting being shown in section; Fig. 2 represents an en larged cross section on the line 22 of Fig. 1, of the mouth of the sleeve; Fig. 8 is an enlarged vertical cross sectional view of the rotatable mouth portion of the sleeve; Fig. 4: is an enlarged cross sectional view on the line H of Fig. 1, showing the internal cams for cooperating with the ball fingers for adjusting the effective diameter of the socket; Fig. 5 is a similar view to Fig. 4, but showing the balls at the bottom of the respective cams and Fig. 6 shows an enlarged perspective view of the ring and integral resilient ball fingers.

Referring to the drawing, it will be seen that the improved desk set fountain pen sleeve is mounted on a base A by a ball and socket joint; the lower end of the sleeve member B being providedwith a ball C, secured to the lower end of the sleeve by a screw threaded stem D extending from the ball as shown in Fig. 1. The ball 0 is mounted and resiliently held in a socket member E, which, as usual, is cut away at the upper end so that the sleeve may be adj usted in any angular position, a notch being provided at F to permit positioning the sleeve horizontally. The ball socket member E is bored out at G and provided with a sliding cup member H, engaging the lower side of the ball C and held in engagement therewith by a spring K which also holds the ball C closely in its socket. The spring K is preferably held in place by a fiat headed screw L, which in the present instance, also serves to clamp the ball socket member E to the base A as will be seen in Fig. 1.

The sleeve member B is provided with a central bore or socket M adapted to receive the nib N of the pen which, as shown in Fig. 1, extends downward into the socket M from the stem 0 of the fountain pen. The sleeve member B, above the socket M, is taperingly counterbored at P and mounted in this counterbore are a plurality of resilient stem supporting centering and gripping fingers Q, which, in the present instance, are formed integral with a ring R fitting closely in the bottom of the tapering socket P and secured therein by any suitable means, such as thepin S. The upper ends of the resilient fingers Q are in the present instance, provided with terminal balls T adapted to engage the stem 0 of the pen and center it relative to the lower or nib socket'M. As previously explained the ball fingers are preferably resilient and arranged to be brought to engagement with the stem 0 of the tapering counterbored socket P; The mouth piece U is, in the form illustrated,

provided with a depending skirt orcylindrical flange V, havinga plurality of inward- 1y extending cam surfacesW, as will be more particularlyrseen in'Figs. 4 and 5, arranged to cooperatewith the balls -T. These internal cams extend from a low concave portion at X, lyingg-closetothe outer peripheral surface of 1 the flange-V of the mouth piece U, and. de-

fine the outer llmit ofmovement of the balls T and. the greatest effective internal diameter oriextentiofqopeningforinserting the stem ofithe pen. p 7

The upperI-end of the sleeve member B is preferably provided with an internal groove Y, adaptedto register with a corresponding annulan groove Y in; the outer surface of the cylindricalfiange or skirt V of the mouth piece=.-U and a wire spring, ringZ is inserted in thergrooves- Y-,,Y in the usual way, to hold the mouth piece U for rotation in the end-of? the sleeve, member 13 and axially thereof, I

In Fig. ethe camsonthemouth piece are; shown with theballs about vin the middle ofrthe rise.-. By, rotatingthemouth piece U from theeposition shown in Fig. 4 to'the positioneshown in Fig; 5, the cam surfaces are moved so that theresiliency of'the fingers carry; the balls Tiradially outward ,to thecon cave portions Xv and the effectivediameter of the socket is enlargedto the limit as indicated by thedotted circle in Fig- 5. By rotatingg theemouth piece U in the opposite direction vor back to the position shown on Fig l, the effective. diameter of .the socket is reduced, .assindicated by the dotted circle in Fig; 4. j 1

- From ztheeabove, it will be seen that fountainlpens ofidilferent sizes, orlthe stems may be of; diiferent sizes, may be inserted. and used1in=c0nnection with the desk set sleeve 'by adjusting rthe gripping balls-T1; which may be doneb'y rotatingthe'mouth piece U until-theballs engage the stem Oof the pen; This arrangementfor a. variable socket or gripping; sleeve. for the pen also permits a understood that by means ofthe gripping balls, the stem of the pen will be engaged substantially by points so that if they should become stained with ink, the point contact of the balls with the stem of the pen will prevent the latter from being covered with ink, which might stain the fingers. v

It'will be understood that while the preferred form of the improvement has been shown, various modifications in the specific detailsofconstruction and arrangement of the essential elements may be made without departing'from the spirit and scope of the invention.

1. A desk set fountain pen sleeve comprising a socket for the nib of the pen, a counter-'- bored socket portion in the sleeve above said nib socket, a plurality of spring fingers mounted within said counterbored socket portion, said spring fin ers being provided at their upper ends with balls for point engagement with the stem of the pen, a rotatable mouth piece mounted at the upper end of the sleeve and provided with a cylindrical skirt portion extending into said counterbored socket portion and internal circumferential cams on said skirt portion cooperating'with the ball ends of said spring fingers for vary ing the radial position of the balls by rotation of said mouth piece. I

2. The desk set fountain pen sleeve as in claim 1, wherein said spring fingers with the ball ends are formed integral with a ring adapted to fit into and be secured at the bottom of said counterbored socket portion and sand rotatable mouth piece is secured at the upper end of the sleeve with the skirt portion thereof in said counterbored socket portion and held for rotation therein by means cooperating with an annular groove in said skirt portlon.

SADAYOSHI NAKAHARA.

moreready removal .or insertion of the pen,

for: by; rotating the -mouth piece U in one direction the effective diameter-of the stem socket; can be --enlarged before; inserting the pen and afterwards the. stem; of the pencan be securely gripped; by rotating the-mouth piece in.=the;opposite direction It will. be 

